The points 1, 2, and 3 are all the same very large distance from a dipole Rank t

Question

The points 1, 2, and 3 are all the same very large distance from a dipole Rank the points according to the values of the electric potential at them, from to the most negative to the most positive. 1, 2, 3 3, 2, 1 2, 3, 1, 1, 3, 2 1 and 2 tie, then 3 The plate areas and plat separations of five parallel plate capacitors are capacitor 1: area A_o, separation d_o capacitor 2: area 2A_0, separation 2d_o capacitor 3: area 2A_0, separation do/ 2 capacitor 4: area A_0/2, separation 2d_o capacitor 5: area A_o, separation do/ 2 Rank these according to their capacitances, least to greatest. 5, 4, 3, 2, 1 1, 2, 3, 4, 5 4, 1, and 2 tie, then 5, 3 5, 3, and 4 tie, then 1, 2 3, 5, 1 and 2 tie, 1, 4 The resistance of a rod does NOT depend on: its temperature its material its length its conductivity shape of its (fixed) cross-sectional area "The sum of the currents into a junction equals the sum of the currents out of the junction" is a consequence of Newton's third law Ohm's law Newton's second law conservation of energy conservation of charge

Explanation / Answer

1)(E)1 and 2 tie, then 3

The potential of an electric dipole is:

V = k p cos(theta)/r^2

r is same for all; for 2 and 1 ; theta is 0 and for 3 its 90 deg. So Potential will be same for 1 and 2 and zero for 3.

2)(E)3,5,1 = 2 > 4

C1 = epsilon0 A0/d0

C2 = epsilon 2A0/2d0 = C1

C3 = epsilon0 2A0/d/2 = 4 C1

C4 = epsilon0 A0/2 x 2d0 = C1/4

C5 = epsilon0 A0/d/2 = 2 C1

C3 > C5 > C1 = C2 > C4

3)(D)Its conductivity.

R = rho L/A

where, R is the resistance ; L is the length ; rho is the resistivity ; A is the area of cross section

Its independent of conuctivity.

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